What are the orange-brown question-mark tiles?

They are cover inside the dense tower. Wait for the target route to expose a removable face instead of using the cover as a shortcut.

How do I know Level 25 is finished?

The final mixed fragments clear, then the source shows the crown/reward bar and a `WELL DONE` completion state.

Cube Tap Sort level guide

hard 12 colors

Open Level 25's dense covered tower from purple and green, manage the buffer through the inner layers, and finish the mixed cluster.

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From the exposed inner tower, clear purple 1 and green 3 in the opening target row.
After the covered tower shifts automatically, follow the cyan/yellow groups on the newly exposed layers.
As the tower drops into a low cluster, take red/orange from the front layer, then blue, gray, and peach from the newly exposed inner edge.
Keep the orange-brown question-mark tiles out of the buffer plan and preserve capacity for a rear-layer color that the target row has just named.
Clear the final mixed fragments at the low cluster's left and right edges after their phase appears, then wait for WELL DONE.

Colors in this level:

Purple, Green, Cyan, Yellow, Red, Orange, Blue, Gray, Peach, Pink, Lavender, Lime

Start with the exposed purple 1 and green 3 groups in the inner tower.
After the tower re-presents automatically, take cyan/yellow, then red/orange and blue/gray from the opened layers.
Keep capacity available while the covered mass breaks apart; a rear-layer match can still be unusable.

Board notes 5 details

Layout: The opening board is a dense multicolored tower with orange-brown covered tiles and translucent blue inner edges. Purple 1 and green 3 are active, and the buffer row is empty.
Goal: Advance through cyan, yellow, red, orange, blue, gray, and peach before clearing the final mixed-color fragments.
Opening: Clear the exposed purple 1 and green 3 groups, then wait for the covered tower to settle.
Danger Zone: Question-mark cover tiles and translucent rear layers hide the route; early taps can fill the buffer before the next group is exposed.
Mechanics: A dense covered tower collapses automatically into a low mixed cluster as target groups clear; no manual swipe is established. The translucent blue edges continue to hide later faces while the buffer fills.

What are the orange-brown question-mark tiles?
They are cover inside the dense tower. Wait for the target route to expose a removable face instead of using the cover as a shortcut.
How do I know Level 25 is finished?
The final mixed fragments clear, then the source shows the crown/reward bar and a `WELL DONE` completion state.